Answer : We know that

Probability of occurrence of an event

Hence the total no.of outcomes are 2 (i.e. heads and tails)Total outcomes of the coin are tails and heads

And the desired output is tail. Hence no.of desired outcomes = 1 Therefore, the probability of getting a tail is=1/2

Conclusion: Probability of getting a tail when a coin is flipped is 0.5 or 1/2